55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
#ifndef slic3r_InternalBridgeDetector_hpp_
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#define slic3r_InternalBridgeDetector_hpp_
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#include "libslic3r.h"
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#include "ExPolygon.hpp"
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#include <string>
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namespace Slic3r {
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// BBS: InternalBridgeDetector is used to detect bridge angle for internal bridge.
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// this step may enlarge internal bridge area for a little(only occupy sparse infill area) for better anchoring
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class InternalBridgeDetector {
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public:
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// input: all fill area in LayerRegion without overlap with perimeter.
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ExPolygons fill_no_overlap;
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// input: internal bridge infill area.
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ExPolygons internal_bridge_infill;
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// input: scaled extrusion width of the infill.
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coord_t spacing;
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// output: the final optimal angle.
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double angle = -1.;
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InternalBridgeDetector(ExPolygon _internal_bridge, const ExPolygons &_fill_no_overlap, coord_t _spacing);
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bool detect_angle();
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private:
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void initialize();
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std::vector<double> bridge_direction_candidates() const;
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struct InternalBridgeDirection {
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InternalBridgeDirection(double a = -1.) : angle(a), coverage(0.), max_length(0.) {}
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// the best direction is the one causing most lines to be bridged and the span is short
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bool operator<(const InternalBridgeDirection &other) const {
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double delta = this->coverage - other.coverage;
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if (delta > 0.001)
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return true;
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else if (delta < -0.001)
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return false;
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else
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// coverage is almost same, then compare span
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return this->max_length < other.max_length;
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};
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double angle;
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double coverage;
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double max_length;
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};
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double resolution = PI/36.0;
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ExPolygons m_anchor_regions;
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};
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}
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#endif
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